Winding or hoisting drum.



APPLICATION FILED NOVZS. 1902.

F0 MODEL.

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Patented April 19, 1904.

UNITED STATES PATENT OFFICE.

HENRIT F. JAMES, OF FRANKLIN, PENNSYLVANIA.

wlNDlNG. oRHols-rme. DRUM.

SPECIFICATION forming part of Letters 'Patent No. 757,622, dated April 19, 1904.

-.pplieaticn lecl November Z8, 1902. Serial No. 133,142. (No model.)

To all whom, it 1v1/ay con/cern,.-

v Be it known that I, HENRY, F. J AMES, a citizen of the United States, residing at Franklin, in the county of Venango and State of Penn- Sylvania, have invented certain new and useful Improvements in Winding or Hoisting Drums, of which the following is a specification, reference being had therein to the accom-4 panying drawings.

My invention relates to `improvements in drums for windlasses, capstans, cranes, and like hoisting devices and will be fully understood by reference to the accompanying drawings, in which- Figure l isan end elevation. Fig. 2 is a side elevation, parts beingshown in section. Fig. 3 is a perspective view of a shell or portion of lagging.

In said drawings the same referencesym bols indicate identical parts in the several` views.

My device consists of a primary drum comprised of a body 1, having at each end thereof a head 2 and 2. Saidbody has formed therein a suitable bearing 3 for the reception of a shaft or axle, and thus constructed my'drum is substantially of the form in common use in machines of the class named; but it often becomes desirable to increase the diameter of a drum for various reasons, and it is with a view of supplying a drum of variable diametery that my device has been conceived.

For the purpose of varying the diameter of my drum I provide semicylindrical shells, Fig. 3, adapted to lit between heads 2 and 2" of my drum and to be secured in place by screws or bolts 4, passing through the iianges 5. For the purpose of protecting said bolts or screws from detrusion I form a radial bead 6 upon the inside of the heads 2' and 2', and in the fianges 5 at their juxtaposed edges is formed a recess 7 to conform to said bead or receive same, so that when the drum is revolved the strain of traction upon the periphery is sustained largely by the radial beads 6, and thus the screws 4 are largely relieved of a shearing strain which would be otherwise exerted upon them. Thus, be it understood, that should a drum of larger diameter be desired than that alforded by the body l the shells 8 and 8 could be attached, and if a still larger drum is desired the shells 9 and 9 could be attached, each set of shells being secured in position by screws or bolts 4, which may be quickly removed when occasion requires. Y

Having thus described my device, what I claim as new, and desire to secure by Letters Patent, is'- In a hoisting or winding drum, a primary drum having a flange at each end thereof, ra-

dial beadsupon said flanges, holes formed in said flanges adapted for the reception of bolts or screws, in combination with semicylindr'ical shells, having a flange at each end thereof adapted to be received between the flanges of the primary drum, and be attached thereto by means of screws or bolts, means of relieving the shearing strain upon said bolts or screws, substantially as specied.

In testimony whereof I aflix my signature in presence of two witnesses.

HENRY F. JAMES.

Witnesses:

CHARLES H. HoLLIsfrEE, BERTHA J. HoLLis'rER. 

